Book guide for paper cutters



March 10, 1931. j 5 LEE 1,795,611

BOOK GUIDE FOR PAPER CUTTERS Filed Dec. 26. 1929 Patented Mar. 10, 1931UNITED STATES PATENT OFFICE JAMES EDGAE LEE, OF GRAND HAVEN, MICHIGAN,ASSIGNOR T'O CHALLENGE MA CHINERY GO, OE GRAND HAVEN, MICHIGAN, ACORPORATION OF MICHIGAN BOOK GUIDE FOR PAPER CUTTERS Application filedDecember 26, 1929. Serial No. 416,669.

This invention relates to a book guide for paper cutters. It is usualafter the leaves of a book have been bound together to cut the same attheir edges, use being made of a heavy and usually power operated cutterfor such a purpose. The bound leaves of the book, where bound together,are quite liable to shift out of proper position with reference to eachother and it is an object and purpose of the present invention toprovide devices which may be readily attached to the cutter against andunder which the said bound edges of the leaves of the book may be passedso as to force the leaves together and hold them properly, after which aclamp is brought against the leaves of the book, followed by theoperation of the cutting knife in front of the clamp to cut the oppositefree edge portions of the leaves with a. smooth cut, whereby the outeredges of the leaves are even and in the same plane and have been heldproperly in the cutting so that no unevenness and raagedness ofappearance occurs.

The devices which I have provided under which the edges of the leavesare inserted, are attached to an adjustable back guide of the cutterwhich may be moved to different positions on the supporting table of thecutter. .ln my invention said devices are of a novel design whereby theycannot be moved into a position such that they will at any time extendinto the path of movement of the movable clamp or the knife of thecutter and be broken or otherwise injured on the downward movement ofsaid clamp or knife.

A further object of the invention is to provide devices of thischaracter which are very simple and easy to produce from themanufacturing standpoint, and which may be ad- 0 iustablv attached tothe back guide of the butter for different thicknesses of books. Theinvention will be apparent upon an un dcrstanding thereof had from thefollowing description, taken in connection with the accompanyingdrawing, n which,

Fig. 1 is a perspective view of the book guide device of my invention.

Fi 2 is a fragmentary longitudinal section through the table, backguide, clamp and cutting knife of a cutter and having my in ventionapplied thereto, and

Fig. 3 is a horizontal section and plan looking' downwardly from theplane of line 33 of Fig. 2.

Like reference characters refer to like parts in the different figuresof the drawing. In the construction of the cutter a horizontalsupporting'table 1 is mounted upon which the hook having a plurality ofleaves 2, is adapted to be placed, having its bound edges abuttingagainst forwardly extending spaced apart vertical fingers 3 whichextendfrom a back guide at mounted transversely of the table and in practiceadjustable to different positions on the table.

This back guide 4 with the attached fingers is designed to lie back of avertically mov able clamp 5 which may be moved up and down, in its upperposition releasing the leaves of the book and in its lower positionpressing thereagainst' at their upper side ,to clamp thesame snuglyagainst the tablel. Directly in front of the clamp 5 a cutting knife 6is mounted on a reciprocatory plunger 7 suitably guided so that on itsdownward movement it may performthe cutting operation.

The guides under which the bound edge portions of the leaves 2 are to beplaced each comprises a vertical bar 8 the lower end of which is cutdownwardly and rearwardly, as indlcated at 9. at anacute angle. From thelower end'and rear side of the bar 8 two spaced apart cars 10 extend,througl'i one of which a set screw 11 is threaded. The guides describedare designed to be applied at the front edges of certain of the fingers3,'the space between the innersides of the ears 10 being slightlygreater than the thickness of a finger 3 so that the ears may pass oneto each side of the finger and the device then be secured in place atany desired height on tightening the set screw 11. The edges of theleaves, when pushed back over the table, come into contact with thefingers 3 and engage against the inclines 9 of the book guide bars 8,thereby causing the edges of the leaves to be brought snugly togetherprior to the downward movement of the clamp 5.

It is evident that the bars 8 extending vertically can never passunderneath the clamp 5 and get into the path of movement thereof, saidclamp never being elevated to a plane higher than the upper end of thebars 8. Accordingly, there is no danger of any of the guides interferingwith the downward movement of the clamp and they will not be broken orotherwise injured due to an inadvertent positioning of 'the book guides'too far forward. 'Complete insurance against the guides ever extendingunder the lower end of the clamp 5 in a position to be struck thereby isthus secured. Furthermore, the stopping of the book guides back of theclamp prevents their movement into the path of the knife of the cutter,the delicate edge of which would be greatly damaged by being broughtforcibly against the back guides.

The construction of book leaf guide described, while a very simple one,is ,particu larly practical and cfiicient and has so proved in practice.The invention is defined in the appended claims and is to beconsideredcomprehensive of all forms of structure coming within their scope.

I claim:

1. In a construction of the class described. a supporting bed, a backguide transverse thereof mounted above the bed and having a plurality ofspaced apart forwardly extending vertical fingers, a vertically movableclamp located vabove the bed in front of said back guide, and aplurality of book leaf guides secured to selected fingers at the frontthereof and extending vertically above said fingers and vat their upperends to a point above the uppermost position of movement of said clamp.V

2. In a construction of the class described, a supporting bed, .a backguide located transversely over said bed and movable to differentpositions thereon, said back guide having a plurality of spaced apartforwardly extending vertical fingers, a vertically movable clamp mountedabove said bed in front of the back guide, and a plurality of book leafguides adjustably secured to selected fingers, each comprising avertical bar, and means for securing said bars at different positions inthe length of the fingers, the upper ends of said vertical barsextending to a point above the uppermost position of movement of theclamp.

23. A book guide comprising a vertical bar having a downwardly andrearwardly inclined lower end edge and a pair of cars extending from thelower end portion and at the rear edge of said bar, combined with meansfor adjustably securing said ears to a support. 7

4;. A device of the class described comprising a vertical barrectangular in cross section having a downwardly, and rearwardlyinclined lower end edge, a pair of earsproject- JAMES EDGAR LEE.

